Method of turning rolls having duplicate passes.



E. W. THOMAS.

Patented Aug. 31, 1915;

not,

ELMER W. THOMAS, F JOLIET, ILLINOIS.

I MEEFHOD TUBNILIG ROLLS HAVING DUPLICATE Passes.

I To all whom it may concern .f

Be it known that I, ELMER W. THOMAS, a citizen of the United States, and resident of Joliet, in thecounty of Will and State of Illinois, have invented certain new and use- 1 ful Improvements in Methods of Turning RollsI-Iaving Duplicate Passes, of which the following is a specification.

My invention relates to the art of metal rolling and has particular reference to a novel method of preparing rolls having duplicate passes. 1

In the production of commercial rods,

bars, etc., it is customary to provide rolls having a large number of duplicate passes.

, These rolls usually are provided with'seventy passes, each a duplicate of the other. I The problem involved in turning these rolls is considerable particularly in view of the fact'that as stated, each pass must be a du- .plicate of the other. These rolls have usually been turned by the use of a single tool,

one pass being turned at a time. This has.

i required the use of a templet in order to turn each pass and has further required the location of a completed roll in proximity to the roll being turned in order that the passes in two rolls may be made to register. In spite of these precautions it is not unusual to require. longitudinal adjustment of the rolls when changing from one pass to anoth'erto secure proper register.

By the use of my novel method herein described I am enabled to turn a large number a of passes simultaneously; I avoid the use of templets or spacing devices; all the'passes are turned exactly the same size and with exactly the same spacing relation to each 1 other and the work may lbe performed much more quickly. and satisfactorily.

..My novel method may be said to consist in making a-pluralityof simultaneous cuts in the surface of a roll, then shifting the cutting device and roll relative to each other to cause the register of one of the cutting tools with a out already made, then making other cuts, the spacing for the difierent'cuts being secured by maintaining one of said cutting tools in register with a out already x ever, that the usual roll is provided with seventy grooves or passes and that the cut-v fofme An apparatus for carrying out my imand provided with my novel cutting tool by Specification of Letters Patent. Patented Aug. 311, 19115.

Application filed m rch 1a, 1914. Serial No. 824,657.

means of which a plurality of cuts may be simultaneously made; Fig. ,2 is a section on I adapted to be reciprocated toward the axis of the roll 10', by means of the screw 15. The tool 16, as best shown in Fig. 3, may consist of a bar having side channels 17, and'provided with triangular cutting por- ,tions 18, 19, on opposite sides thereof, each side being a duplicate of theother. r'llhe top and bottom configuration is likewise the same. Such tool may have as many cutting portions as desired. It will be understood, however, that such a tool has four cutting edges; that is, a cutting edge at the top an bottom on both sides.

As shown in Fig. 1, aroll'imay be turned according to my novel method as follows: The tool 16 is suitably located in order to complete the cuts 20 at the center of the roll.

These cuts will, of course, be made to the until the bar will'contact the periphery ofv the roll. Thus there is no possibility of making the out too deep. After the cuts 20 are completed the tool may be moved. to the extreme right or. until one of the cutting edges 18, at the extreme left hand portion 61 the tool registers with the extreme right hand out 20. Uther cuts 21, are then made, the exact spacing being'secured by maintaining the one cutting edge in register with the right hand cut 20. Thus the complete roll may be turned all the cuts being made 'to the exact required depth and exactly spaced one from'the other, all without the use of templets or requiring skilled-labor.

The 1001 shown is provided with but seven cutting portions and the roll is shown I as very short. It will be understood, howting tool may have any number, usually sev- I j is exactly alike.

duced at a greatly reduced cost both in labor to top the rolls as ,the thickness of the collars, which is the space between each pass,

Rolls may thus be proand tool steel. There is less delay in the mill on account of changing passes as each pass is directly over each other and requires no endwise adjustment of the rolls.

I claim:

The herein described method of cutting passes in rolls, which consists in rotating a roll and subjecting it to the action of a tool having a serles of cutting portions and cutting passes in the rolls by said cutting portions, relatively shifting the roll and tool in the direction of the axis of the roll to bring one of the terminal cutting portions into register with one of the passes and other cutting portions in cooperative relation With an uncut portion of the roll and subjecting said uncut portion of the roll to the action of the cutters to out other passes, said one pass serving as a gage for successive passes.

ELMER W. THOMAS; Witnesses: I

C. H. HosLER, D. J. Hairs. 

